var FrameLength;
var FrameTopName;
var FrameMainName;

//FrameLength = parent.frames.length;
FrameLength = document.getElementsByTagName("frame").length;

if( FrameLength == 2 || FrameLength == 3){
	FrameTopName = "parent.frames[0].";
	FrameMainName = "parent.frames[1].";
}